That's pretty impressive. I've lost even harder than that. Damage over 100,000k trying to carry real noobs. Your teamates seemed to do well in that game, from a statistical point of view. In-game they were likely not effective. Still, 8-0 is pretty close, that's not a horrible loss. I had a recent game that ended 1-0.
Having a good killing stats does not mean you are better than others. Look closely, the 2nd one managed with his best to aid you, while the least killing one in your team has best capture/decapture points, which mean he was doing point capping task in your place.
In the end, your team lost is because of VP, which came from point capping, yet you have least stats about it. Which means, it's your own fault.
That is all I can analyze from your evidence(stats screen).
Next time, post the replay in strategy room so everyone can see what is going on and give better advises.
On: realize you are playing randoms. Winning or losing depends both on your own skills and luck. If you really want to know what else to do, visit stage office and upload the replay.